Mounting for electric motors



Feb. 10, 1925.

T. P. BROWN MOUNTING FOR ELECTRIC MOTQRS Fiid Nov. '2, 1921 Patented Feb. 10, 1925.

' UNITED I STATES PATENT, OFFICE.

THEODOREP. BROWN, OF WORCESTER, MASSACHUSETTS, ASSIGNOR TO EARLE E. CON- WAY, OF BOSTON,

MASSACHUSETTS, CARLE C. CONWAY, OF NEW YORK, N. Y., AND

SAID THEODORE 1?. BROWN, OF WORCESTER, MASSACHUSETTS, TRUSTEES DOING BUSINESS AS SIMPLEX PLAYER ACTION COMPANY.

MOUNTING FOR ELECTRIC MOTORS.

To all whom it may concern Be it known that I, THEODORE P. BROWN,

-a citizen of the United States, residing at Worcester, in the county of Worcester and Commonwealth of Massachusetts, have in vented a new and useful Improvement in a Mounting for Electric Motors, of which the following, together with the accompanying drawings, is a specification.

My invention relates to' an improved mounting for electric motors, such as are employed to drive the operating mechanism of player pianos and other similar mechanically driven musical instruments.

The object of my invention is to provide an improved mounting for an electric motor so arranged that substantially no vibrations,

due to the operation of the motor, will be transmitted from the motor to the member upon which the motor is supported, such, for

example, as the base board of a piano. Obviously, he transmission of any such vibrations to the piano frame would be extremely undesirable, for they tend to set up noises 55 which would be audible while the piano is being played.

By my invention, I provide a mounting for a motor, so constructed that no vibrations will be transmitted from the frame of 80 the motor. Other advantageous features of my invention will hereinafter appear, reference being had to the accompanying drawings, in which- Fig. 1 is a view .in end elevation of an electric motor mounted in accordance with my invention.

Fig. 2 is a view in side elevation of .the parts shown in Fig. 1.

Fig. 3 is a plan view of the mounting with the motor removed therefrom to illustrate the parts more clearly.

Like reference characters refer to. like parts in the different figures.

Referring to the drawings, a motor generally indicated at 1 is provided with a driving shaft 2 having a pulley 3 mounted thereon, from which power is transmitted to a pulley 4 by means pulley 1 is mounted on a shaft 6 which is connected to the operating mechanism of a player piano action. Inasmuch as the particular type of piano player action forms of a belt 5. The

no part of the present'invention, it will not be further described herein.

The frame of the motor 1 is provided with feet 7 located at its corners, and the pair of feet 7 on the same side of the motor 1 are secured to a flexible member 8 by means of bolts 9 and nuts 10 cooperating therewith. Each member 8 is preferably formed of some suitable flexible durable material, such as the closely woven fabric often employed for straps or belting. The respective ends of each member 8 are looped over rods 11, the free ends being secured to the remainder thereof by means of the bolts 9, so that the strap 8 is stretched tightly between the rods 11 and at the same time is capable of turning slightly at its-looped ends on the rodsll.

The rods 11v are supported at their ends between blocks 12 extendin" substantially at right angles to the rods 11. The blocks 12 are provided with openings 13 for receiving bushings 14- which surround the end portions of the rods 11. Each bushing 14 is formed of some relatively-soft shock absorbent material. such as felt. which, being of a frictional nature, permits the rods 11 to move therein without sliding freely. The blocks 12 are supported upon the base 15 of the instrument by means of stripsv 16 of some soft compact material. such as felt, the blocks 12 being secured to the base 15 by any suitable means. i

A spring 17 is secured at its ends between one bearing 18 of the motor 1 and a side wall 19 of the piano casing. The spring 17 tends to hold the shaft 2 away from the shaft 6 and thereby keep the belt 5 tight, it being obvious that the entire motor is capable of lateral horizontal movement with respect to the shaft 6, by reason of the fact that the rods 11 may slide in the bushings 14.

From the foregoing, it is apparent that I so constructed that when the motor is running. substantially no vibrations can be transmitted to the base upon which the motor is supported. Itis o vious that any vibrations of the motor l'will be absorbed, first, by the flexible straps 8, upon which the motor frame is directly-mounted, and then by the bushings 14 which support the have provided an lmproved motor mounting,

rods 11 and also allow slight movement of the motor by the spring 17 in order to keep the belt 5 ti ht. Finally, any very slight vibrations W ich may possibly reach the blocks 12 will be absorbed by the strips 16 which support the blocks above the base member 15. Consequently, the motor 1 may be operated to drive the player action of the piano without setting up any noises which might prove disturbing while music is being played by the instrument.

While I-have shown my improved motor running in its simplest and preferred form, it is not so limited but is susceptible of various modifications within the scope of the appended claim.

I claim, A mounting for motors, comprising a pair of. spaced horizontal members substantially parallel, a pair of. rods extending between,

and through said horizontal members, said rodsbeing also horizontal and substantlally perpendicularto' said members, shock ab- 4 sorbent bushings to slidingly receive the rods in the members, a pair of straps looped around said rods, drawn taut between the rods, and fastened to a motor frame to hold the motor resiliently, with the motor shaft v 

